Method of making paper bottles.



G. L. JENKINS.

METHOD OP MAKING PAPER BOTTLES.

APPLICATION FILED JUNE 27, 1007.

, Patented July 13, 1909.

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|464!! llllllnlllll GRACE L. JENKINS, OF WASHINGTON, DISTRICT OF COLUMBIA.

METHOD OF MAKING PAPER BOTTLES.

speciiication of Letters Patent.

Patented July 13, 1909.

Application led June 27, 1907. Serial No. 381,056.

To all i/.iiom it may concern:

Be it known that I, GRACE L. JENKINS, citizen of the United Sta-tes, residing at Washiiig'ton,l in the District of Columbia, have invented certain new and useful Improveinciits in Methods of Making Paper Bottles, of which the following is a specification, reference being had therein to the accompanyingr drawing. i M y invention relates to a method for forminnr and closing* paper bottles, such for exam- A ple as milk bottles, and particularly to a iiiiea baan.

method lfor inserting' tops and bottoms in the tubular bodies of such bottles. l

In the. accompanying drawings, Figure 1 represents in dianietrical section a.' disk adapted to be inserted in a bottle as a bottom or a top for the same. Fig. 2 is a sectional View of a bottle, a bottom in process of insertion, and certain appliances involved iii the operation. Fig. 3 is a similar view showing a disk in process of insertion as a top in a Fig. 4 is a similar View showa filled bottle with both top and bottom in place. showing a double disk. Fig'. 6 is a view similar to Fig. 4, showing double disks in place in a filled bottle.4 Fig. 7 is a plan view of a portion of a certain divided ring.

in these drawings, A representsa tubular bottle body of paper, made in any suitable manner and Bia concave paper disk which is preferably slightly greater in diameter than the internal diameter of the body A and when pressed into plane form is .further increased in diameter. To insert one of these disks in the body A, to serve as a bottom, the body is placed over a rigid slightly smaller cylindrical `form of such height that when the lower end of the paper body rests upon a flange D, or vthe like support, the plane upper face ol' the forni lies at some distance below thel upper end of the paperbody, as shown in Fig'. '2. Around the paper body is preferably placed a closely fitting ring,r E (shown in this instance, as extending' from the top ol' the body only a little below the plano of thcl u pper end of the foi'in) having an internal annular groove F nearly iii thc plane of tho upper end of the forin. One of the disks is then laid upon t,he'upper ond of'thc paper body and pressedlowu lby a rigid plane-faced V'plunger G of approximately the same diameter as the disk and thc interior of the paper body, and having' its center, or axis, in the eoniinon axis oi the loi-in, disk and body A.

Fig. 5 is a section similar to Fig. 1'`

As the disk is forced down, its downwardly bulgingv middle is prevented from descending 'by the form, and its margin swells the body A outward into the groove in the ring, as shown' in Fig. 4, the disk under the heavy pressure necessarily assuming plane form. In practice, when the plunger and rim;r are removed, the disk remains substantially plane and securely held in the groove which it has itself formed in the body A. 'llie removal of the ring is facilitated by dividing' it as shown in Fig. 7, the endsv being held by any suitable locking device, shown as a pivoted link E.

When the bottle is to be lfilled and closed, the desired quantity of liquid I, which is usually milk, is placed in the bottle, the latter is placed upon a form J, Fig. 3, similar to the forni C but only high enough to reach the bottom of the bottle, and another disk is placed upon the upper end of thebottle and forced down by the plunger as before, the li uid itself serving in this case as the form. O course, the liquid is at first centrally displaced by tlie disk, but practically none es'- 'capcs and when the disk reaches its lowest point the air is practically all forced out leavinf,lr the bottle in effect lierinetically sealed with no air inside. It might appear that since air can escape it can return, but it is to y be remembered that it escapes under heavy pressure while there is no pressure to urge its return, and further the tendency of the matoi'ial to recoil slightly when pressure is i'cmoved practically closes the space through which th air escaped. The ring is not shown in F ig. 3, but is, oi' may be, used in closing the bottle the saine as in inserting the bottom. After the package is thus filled, iicitlier disk can be removed without its clearly showing that it has been tampered with, and hence bottles sealed at the factory, dairy, or farm, reach the consumer with the contents practically guaranteed', and it is i'ii'acti -,ally impossible for intermediate handlci's to replace part of the contents with water' as sometimes happens with ordinary packages.

F ig. 5 shows a double disk,I thc two plates K, li, being connected at the middle by a separating;l piece M. When this form isused, onc of the plates is preferably 'made slightly smaller than the other, thc larger ono only, seatingr itself in thc grooveiin the bodyT A, as shown in F ig. 6.

lWhat claim is:

1. The method of closing a tube of yielding -Which consists in providin a p material which consists inpassing a closely lit/ting concave plate into the tube to the closing point, and then flattening the plateuntil its edge forms a depression m the Wall of the tube and is firmly seated in said depression.

2. The method of sealing a filled receptacle which consists in supplying thereto a concave disk of a diameter approximately equal .to the internal diameter of that portion of the f receptacle' in which it is to be seated and forcing the disk into the rece taele until it lattens against the contents t ereof.

3. The method of forming parier bottles iable tubular body, inserting in said bo y a closely fitting transverse, concave disk, holdin the exterior of the bodyl alongside the p ane of the I disks margin to localize expansion, and compelling the disk to assume approximately plane form.

In testimony in presence of two Witnesses.

GRACE L- JENKINS.l

. witnessesz. y

Amon J. MAXFIELD, i J JEROME LIGHTFOOT.

whereof I aflx mysignature 

